Given that the researcher was a participant directly, and that he lied about his actions (he in fact presented suicidal thoughts, etc), I believe the balance of evidence says we should reject the study.
Even without the anecdotal information that things were not presented as they were told, the study is still, and always has been, useless. If someone presents at an asylum begging to be admitted, and describing strange symptoms that they say are causing them distress, it is reasonable to admit them for observation.